GB861676A - Improvements relating to reinforced and prestressed concrete rafters - Google Patents
Improvements relating to reinforced and prestressed concrete raftersInfo
- Publication number
- GB861676A GB861676A GB3405555A GB3405555A GB861676A GB 861676 A GB861676 A GB 861676A GB 3405555 A GB3405555 A GB 3405555A GB 3405555 A GB3405555 A GB 3405555A GB 861676 A GB861676 A GB 861676A
- Authority
- GB
- United Kingdom
- Prior art keywords
- rafter
- tie bar
- bending moment
- reinforced
- support
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/20—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of concrete or other stone-like material, e.g. with reinforcements or tensioning members
- E04C3/205—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of concrete or other stone-like material, e.g. with reinforcements or tensioning members with apertured web, e.g. frameworks, trusses
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/20—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
- E04B1/21—Connections specially adapted therefor
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Rod-Shaped Construction Members (AREA)
Abstract
861,676. Reinforced concrete roof trusses. ISAAC, G. Feb. 28, 1957 [Nov. 28, 1955], No. 34055/55. Class 20(4) A joint between a lower end of an inclined reinforced or prestressed concrete rafter 11, Fig. 1, a tie bar 13 and a support for the rafter wherein the point of intersection P of the line of thrust T of the support with the axis of the tie bar is located below the extended neutral axis of the central part of the rafter, and in which the resultant of the forces exerted on the rafter 11 by the tie bar 13 and support exerts on the rafter a bending moment in the direction tending to bow the rafter upwardly between its ends thereby effecting reduction of the bending moment at the centre of the rafter. The rafter 11 may be part of a truss which may include a second rafter 12 meeting the rafter 11 in a ridge joint 16, which may comprise a resilient packing, and which is located below the intersection of the extended neutral axes of the central parts of the two rafters. The ridge joint also includes at least one tie bar 15 which may be secured by nuts and washers on its ends, Fig. 5 (not shown). The invention may also be applied to a northlight truss, Fig. 3, in which additional reduction of bending moment is effected by an extension 25 on the shorter rafter 25, substantially in line with the longer rafter 23. The tie bars 13, 26 are supported by hangers 14, 27 respectively.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3405555A GB861676A (en) | 1955-11-28 | 1955-11-28 | Improvements relating to reinforced and prestressed concrete rafters |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3405555A GB861676A (en) | 1955-11-28 | 1955-11-28 | Improvements relating to reinforced and prestressed concrete rafters |
Publications (1)
Publication Number | Publication Date |
---|---|
GB861676A true GB861676A (en) | 1961-02-22 |
Family
ID=10360802
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3405555A Expired GB861676A (en) | 1955-11-28 | 1955-11-28 | Improvements relating to reinforced and prestressed concrete rafters |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB861676A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3601939A (en) * | 1968-03-22 | 1971-08-31 | Hugh Mary Clyne | Means for connecting together relatively inclined reinforced concrete supporting members |
-
1955
- 1955-11-28 GB GB3405555A patent/GB861676A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3601939A (en) * | 1968-03-22 | 1971-08-31 | Hugh Mary Clyne | Means for connecting together relatively inclined reinforced concrete supporting members |
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